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Message-ID: <20131218191952.GA8319@redhat.com> Date: Wed, 18 Dec 2013 20:19:52 +0100 From: Oleg Nesterov <oleg@...hat.com> To: Andrea Arcangeli <aarcange@...hat.com>, Andrew Morton <akpm@...ux-foundation.org> Cc: Thomas Gleixner <tglx@...utronix.de>, Linus Torvalds <torvalds@...ux-foundation.org>, Dave Jones <davej@...hat.com>, Darren Hart <dvhart@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>, Mel Gorman <mgorman@...e.de>, linux-kernel@...r.kernel.org Subject: [PATCH -mm 2/7] mm: thp: change __get_page_tail() to use __put_nontail_page() __get_page_tail() can use __put_nontail_page() instead of put_page() if it races with split_huge_page(). This is what put_compound_page() does, so this is equally safe. And this allows us to factor out this code later. Signed-off-by: Oleg Nesterov <oleg@...hat.com> --- mm/swap.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/swap.c b/mm/swap.c index f83de1f..aae24fe 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -289,7 +289,7 @@ bool __get_page_tail(struct page *page) } compound_unlock_irqrestore(page_head, flags); if (unlikely(!got)) - put_page(page_head); + __put_nontail_page(page_head); } return got; } -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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